CAPE GIRARDEAU, Mo. -- With voting underway in the West Virginia Democratic primary, Sen. Barack Obama Tuesday turned his attention to a general election battleground.

Obama, D-Ill., was set to spend the afternoon campaigning in Missouri, a key general election swing state, rather than staying in West Virginia, where local polls showed rival Sen. Hillary Clinton, D-N.Y., leading by a wide margin, CNN reported. The results of the West Virginia primary, however, will have little impact on the race for Democratic delegates, in which Obama has piled up an all-but insurmountable lead.

Instead, Obama is focusing his strategy on the general election and presumptive Republican nominee Sen. John McCain, R-Ariz., by turning his attention to Missouri, which has already held its Democratic primary. He was set to have a town hall meeting in Cape Girardeau, Mo.

Despite her likely resounding win in West Virginia, Clinton's challenge continues to fade. In addition to trailing Obama in pledged delegates, a CNN count showed Obama leading as well among superdelegates. Her campaign has also revealed it is $20 million in the red.